I will put out a good guess and I don’t typically pay that close attention to Stack auctions.

Most 1 bitcoin coins do not sell or barely sell when auctioned off. Not due to them not being worth it, but mainly because of the 20% buyers premium, local sales tax (8% here) and shipping by armored truck. Don’t be discouraged if they don’t sell.

Now I wouldn’t purchase 1 bitcoin Cas coin myself unless the provenance was impeccable. 100k is a lot to risk when you don’t know the chain of custody.

My advice is still to peel/redeem and sell the carcass